java/admin/src/main/java/com/exadel/frs/validation/EnumValidator.java
<reponame>rohankumardubey/CompreFace/*
 * Copyright (c) 2020 the original author or authors
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      https://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
 * or implied. See the License for the specific language governing
 * permissions and limitations under the License.
 */

package com.exadel.frs.validation;

import java.util.stream.Stream;
import javax.validation.ConstraintValidator;
import javax.validation.ConstraintValidatorContext;
import org.apache.commons.lang3.StringUtils;

public class EnumValidator implements ConstraintValidator<ValidEnum, String> {

    private Class<? extends Enum<?>> enumType;

    @Override
    public void initialize(ValidEnum targetEnum) {
        enumType = targetEnum.targetClassType();
    }

    @Override
    public boolean isValid(String value, ConstraintValidatorContext context) {
        if (StringUtils.isBlank(value)) {
            return false;
        }
        return Stream.of(enumType.getEnumConstants()).anyMatch(e -> value.equals(e.name()));
    }
}
